International Journal of Innovative Research and Development

Abstract

This Paper presents the hybrid modulation technique containing of single reference six pulse modulation (SRSPM) for front end dc-dc converter and 33% modulation for 3 phase inverter. The SRSPM technique is used to control the fronted dc/dc converter which produces high frequency (HF) pulsating dc voltage waveform; this is relevant to six pulses at 6x line frequency. Where 6x line frequency rectified 6-pulse o/p of balanced 3 phase AC wave form. Here the Dc link capacitor is eliminated which retains the modulated information of the inverter device to generate 3 phase voltage waveform resulting in significant saving in switching losses of inverter semiconductor devices. During line cycle only 2 switches are required to switch at HF and remaining switches are maintained at unique state (i.e.) either ON or OFF .This Paper explains operation and analysis of the HF two stage inverter with SRSPM technique. Analysis has been verified through simulation result using MATLAB.

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